Firstly, a bit of context and background.
The use of IED's are considered by most security specialists to be an ever more likely approach undertaken by non-state belligerants. Thus it will be a key modus operandi of attack that will spread beyond the current geography of the middle east and central asia. In the future any location that civil society has broken down has the potential to see one or more belligerant parties attempt to use IED's (or god forbid VBIED's).
Thus the NZDF will have to be prepared and equiped to counter the possible use of IED's even within our own Pacific centric area of operational interest. We must not delude ourselves that since our work in A/Stan is nearly complete that we won't again meet an IED threat past April 2013. Though 20kg device detonated in Northern Banyam would no doubt destroy any NZLAV, it does not mean that survivability will always be hopeless. Smaller and more unsophisticated devices will remain a potential threat and in growing numbers and indeed will be survivable. Therefore we should recognise the need to counter such threats.
For this we will need to do two things: 1. Continue to look at new technologies of detection and avoidance and 2. Have increased numbers of protected vehicles to at least STAGNAG 4569 Level 2 or preferably Level 3 survivability available within the NZ Army.
At present the NZ Army operates 60 "Armoured" Pinzgauers - these vehicles fell substantially short with respect to Mine / IED survivability under British operation. However, I do see a useful "policing" role for some of them such as the armoured C2 version and the armoured CSWC's do offer greater small arms protection that the soft skinned versions, nevertheless we need to have the subset capability of a more robust light infantry protection vehicle that bridges the NZLAV and the Pinzers.
Nonetheless, we also have limitations in terms of personnel and operating budgets therefore any additional vehicles to our current numbers of LAV's and Pinzers would not be realistic. As CadreDave pointed out originally cost reasons ruled its big red line through the acquisition of Bushmasters sometime back - albeit before the tragedies of recent times. However, lesson learned and post-factum evaluations of events whether they be cost centric or doctrine centric driven can mean changes can (should) happen.
The upshot of all this is that of the 321 Pinzers currently on the NZ Army books which variant would best see substantial numbers removed from the Army Orbat and either replaced, sold, converted, transfered or stored?
Would it be better that half of the current 68 soft skinned CSWC versions of the Pinzer be replaced with around 34 of the more robust Bushmasters - enough for 2 Squadrons?
Regards MrC